Yes, same here!
Some of my friends carried their kids' bags, and a few times I walked these kids to or from school. One would just chuck his bag on the ground and run off, leaving his mum to pick it up. No chance of that with me, I'm not a slave. I made him come back and get it. The other did struggle a bit with her bag, mainly because her mum routinely packed for a week away rather than a walk to school - big umbrella, whatever the weather, water bottle (fine, but did she really have to stop and get it out for a drink during every 15 minute walk?), all sorts of crap. But a) their decision to pack all this stuff, not mine, and b) I certainly wasn't going to carry this bag when I expected my own kids to carry theirs.